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Geisinger Medical Laboratories Test Catalog
TOPIRAMATE |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB3173 Geisinger Epic ID: 16292 | |
SPECIMEN COLLECTION |
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Specimen type: |
Serum or plasma. | |
Preferred collection container: |
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Alternate Collection Container: |
4 mL green/green-top (sodium heparin) tube
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Specimen required: |
1 mL aliquot of serum or plasma; minimum 0.5 mL. | |
Patient preparation: |
Draw at peak (2-4 hours after dose) or trough (0.5-1 hour before dose). | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Centrifuge and immediately separate serum or plasma specimens from the cells into clean, plastic, screw-capped vial(s). | |
Transport temperature: |
Refrigerated (preferred). | |
Specimen stability: |
Room Temperature: 7 days. Refrigerated: 14 days. Frozen: 30 days. | |
Rejection criteria: |
Stability limits exceeded. Use of serum separator tubes. | |
TEST DETAILS |
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Reference interval: |
Daily dose 100 mg: Peak 6.5-9.2 ug/mL. Trough 4.5-6.6 ug/mL. Daily dose 200 mg: Peak 12-16 ug/mL. Trough 8-12 ug/mL. Daily dose 400 mg: Peak 20-30 ug/mL. Trough 14-20 ug/mL. |
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CPT code(s): |
80201 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Test includes: |
Topiramate(Topamax). | |
Methodology: |
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
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Synonyms: |
Topamax, TOPR Quest test code 30965
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